I think after you maxed out ur championed character, you should be able to still champion cover them. but it would be random like daily resupply, u would get either iso/hp/CP/random appropriate cover or token. and it would also make people to buy roster spots to have all characters.
I wrote something similar in S&F.
I like the idea of getting double Iso-8 for each cover. Max championing is a good sign that you’ve progressed beyond a particular star tier, and thus, need higher rates of incoming Iso-8 to progress in the next star tier.
what do you mean by Buy spots to have all characters… most people who are champion already have everyone dont think? maybe i just think everyone has as many slots as i do… 115 slots 
I’d like something for hitting max champ.
I think it would be cool if we could unlock “clean” versions of the cover art that would replace the existing covers.
I wish the level for hitting max championship was that the characters could become a 5/5/5.
You can always champion a second copy of the maxed out champion.
I’m almost done with my second championed OBW.
Only 2 more to go…
I think its nice that there is a goal that says, “Ok, we you won.” Very few people will ever do so. There are over 80 characters in the game. I think its the games way of telling you, “Time for the next champion.”
I’d be happy if you could just sell covers for a maxed character for double ISO.